A wind power integrated wellhead platform and construction method thereof

Abstract

The present invention provides an integrated wind power wellhead platform and a construction method thereof. The platform comprises a steel barrel foundation, a concrete beam slab, concrete columns, and a steel tower, arranged sequentially from bottom to top. It also includes a jacket wellhead platform, with oil and gas production facilities installed on top. The concrete beam slab is consistent in shape and size with the outer contour of the steel barrel foundation. The concrete beam slab includes a concrete base plate, an inner ring beam, an outer ring beam, and longitudinal and transverse beams, which are fixedly mounted on top of the concrete base plate. The inner ring beam is located in the middle of the top surface of the concrete base plate, the outer ring beam is located at the outer edge of the top surface of the concrete base plate, and the longitudinal and transverse beams are located between the inner and outer ring beams. The longitudinal and transverse beams include longitudinal beams and transverse beams. The present invention can reduce carbon emissions and pollutant gas emissions.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore oil engineering, and more particularly to a wind power integrated wellhead platform and a construction method thereof. Background Art

[0002] Currently, domestic oil and gas energy development companies are gradually transitioning to low-carbon energy sources. For example, in the development of offshore oil and gas resources, they are introducing shore power technology to supply the electricity needs of offshore oil and gas production platforms, replacing traditional fuel / gas generators and reducing carbon dioxide and other pollutant emissions. This has played a positive role in the transition to low-carbon emissions. However, this model is only suitable for near-shore waters. For more distant waters, the increased distance leads to increased technical difficulty and excessive investment, which directly affects economic viability.

[0003] Therefore, there is an urgent need in the prior art for a technical solution to solve the problem that shore power technology cannot be applied to the low-carbon and green development of offshore oil and gas fields in waters far from the shore. Summary of the Invention

[0004] The purpose of the present invention is to provide a wind power integrated wellhead platform and a construction method thereof.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A wind power integrated wellhead platform comprises a steel barrel foundation, a concrete beam slab, a concrete column and a steel tower arranged in sequence from bottom to top, and also comprises a jacket wellhead platform, wherein an oil and gas production facility is arranged on the top of the jacket wellhead platform, and the concrete beam slab is consistent with the shape and size of the outer contour of the steel barrel foundation; the concrete beam slab comprises a concrete bottom plate, an inner ring beam, an outer ring beam and longitudinal and transverse beams, and the inner ring beam, outer ring beam and longitudinal and transverse beams are fixedly arranged on the top of the concrete bottom plate; the inner ring beam is located in the middle of the top surface of the concrete bottom plate, the outer ring beam is located at the outer edge of the top surface of the concrete bottom plate, the longitudinal and transverse beams are located between the inner ring beam and the outer ring beam, and the longitudinal and transverse beams include longitudinal beams and transverse beams; the jacket wellhead platform is arranged at the upper end of the longitudinal and transverse beams, and is fixedly connected to the steel tower by connecting cross braces, and holes for water-blocking pipes to pass through are provided on the concrete bottom plate at the bottom of the jacket wellhead platform and on the top cover of the steel barrel foundation.

[0007] The interior of the steel cylindrical foundation is divided by a main compartment plate to form a circular central compartment and multiple outer ring compartments of equal volume; at least one outer ring compartment is divided into multiple local compartments by an oil wellhead compartment plate and a connecting compartment plate, among which the local compartment surrounded by the oil wellhead compartment plate is the oil wellhead compartment, and the oil wellhead compartment is located at the bottom of the jacket wellhead platform, and is used for allowing the water-proof pipe to pass through into the mud.

[0008] There are four oil wellhead subdivision panels and four connecting subdivision panels. The four oil wellhead subdivision panels are connected end to end in sequence to form an enclosed space for the oil wellhead subdivision. The four connecting subdivision panels are divided into two groups, each group having two connecting subdivision panels. The two groups of connecting subdivision panels are respectively arranged on both sides of the oil wellhead subdivision, dividing the part of the outer ring cabin except the oil wellhead subdivision into four local subdivisions.

[0009] The height of the main compartment plate is the same as the height of the outer wall of the steel barrel foundation.

[0010] The height of the oil wellhead compartment plate is the same as the height of the outer cylinder wall of the steel cylinder foundation.

[0011] The height of the connecting compartment plate is less than the height of the outer tube wall of the steel tube foundation.

[0012] The concrete column is an arc-shaped structure with equal wall thickness. The outer diameter of the top of the arc-shaped section of the concrete column is smaller than the outer diameter of the bottom, and the outer diameter of the bottom is the same as the outer diameter of the inner ring beam.

[0013] The steel tower has a uniform wall thickness structure.

[0014] A wind turbine generator set is installed on the top of the steel tower.

[0015] The present invention also provides the following technical solutions.

[0016] A construction method for a wind power integrated wellhead platform comprises the following steps:

[0017] a. Onshore prefabricated steel barrel foundation, steel tower and jacket wellhead platform;

[0018] b. Use the steel top cap of the steel barrel foundation as the bottom formwork for the concrete slab. Tie steel bars to the steel top cap. Cast the concrete slab, inner and outer ring beams, longitudinal and transverse beams, and concrete columns simultaneously. Weld the steel tower to the top of the concrete columns. Secure the longitudinal and transverse beams to the jacket wellhead platform with anchor bolts. Then, weld the connecting cross brace to the jacket wellhead platform.

[0019] c. Install the oil hole sealing steel plate at the top of the jacket wellhead platform. Then, hoist the entire structure consisting of the steel barrel foundation, concrete beams and slabs, concrete columns, steel tower, and jacket wellhead platform into the water. Check the air tightness of the entire structure. Once it is confirmed that the air tightness meets the standards, install the wind turbine generator set on the steel tower, completing the production of the integrated wind power wellhead platform.

[0020] d. Float and tow the wind power integrated wellhead platform;

[0021] e. After the wind power integrated wellhead platform is floated and towed to the designated sea area, it is first sunk by its own weight and then by suction negative pressure to sink it into the mud to the designated position to complete the installation construction;

[0022] f. The drilling platform is positioned at a certain distance outside the jacket wellhead platform. The drilling platform cantilever beam is moved to the top center of the jacket wellhead platform, and a connection channel is established with the riser inside the jacket wellhead platform to carry out drilling operations.

[0023] g. After the drilling operation is completed, the submarine cable, submarine oil and water injection pipelines are laid from the bottom of the outer wall of the jacket wellhead platform to the wellhead of the jacket wellhead platform. The submarine cable, submarine oil and water injection pipelines are then connected to the wellhead of the jacket wellhead platform and debugged to start oil and gas field production;

[0024] h. After the oil and gas field is completed, the well is abandoned through the water-tightening pipe in the jacket wellhead platform, and the submarine cables, submarine oil and water injection pipelines at the bottom of the outer wall of the jacket wellhead platform are removed. Then, water and air are filled into the steel barrel foundation through the floating crane to lift the wind power integrated wellhead platform, recover it or move it to the next construction site for installation.

[0025] Compared with the existing technology, the beneficial effects of the present invention are: using wind power generation to replace the traditional platform's fuel / gas generators to generate electricity, reducing carbon emissions and pollutant gas emissions; the platform integrates the wind turbine support foundation and the wellhead support platform into one, which can realize overall transportation and installation at sea, reduce engineering costs, improve the platform's economy, and actively promote low-carbon and green development of oil and gas fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a wind power integrated wellhead platform.

[0027] Figure 2 It is a side view of the steel barrel foundation and concrete beam-slab.

[0028] Figure 3 This is a top view of the concrete beam-slab.

[0029] Figure 4 This is a schematic diagram of the compartments of the steel barrel foundation.

[0030] In the figure: 1-steel barrel foundation; 11-main compartment plate; 12-oil wellhead compartment plate; 13-connecting compartment plate; 14-circular center compartment; 15-outer ring compartment; 16-local compartment; 161-oil wellhead compartment; 2-concrete beam plate; 21-concrete bottom plate; 22-inner ring beam; 23-outer ring beam; 24-longitudinal and transverse beams; 241-longitudinal beam; 242-transverse beam; 3-concrete column; 4-steel tower; 5-jacket wellhead platform; 51-connecting cross brace. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to specific embodiments.

[0032] like Figures 1 to 4 The wind power integrated wellhead platform shown includes a steel barrel foundation 1, a concrete beam slab 2, a concrete column 3 and a steel tower 4 arranged in sequence from bottom to top, and also includes a jacket wellhead platform 5. Oil and gas production facilities are arranged on the top of the jacket wellhead platform 5, and a wind turbine is installed on the top of the steel tower 4.

[0033] The interior of the steel barrel foundation 1 is divided by the main compartment plate 11 to form a circular central compartment 14 and multiple outer ring compartments 15 of equal volume; at least one outer ring compartment 15 is divided into multiple local compartments 16 by the oil wellhead compartment plate 12 and the connecting compartment plate 13, among which the local compartment 16 surrounded by the oil wellhead compartment plate 12 is the oil wellhead compartment 161, which is located at the bottom of the jacket wellhead platform 5 and is used for the water-proof pipe to pass through the mud. In this embodiment, there are four wellhead subcompartment panels 12 and four connecting subcompartment panels 13. The four wellhead subcompartment panels 12 are connected end to end in sequence to form an enclosed space for the wellhead subcompartment 161. The four connecting subcompartment panels 13 are divided into two groups, each group having two connecting subcompartment panels 13. The two groups of connecting subcompartment panels 13 are respectively arranged on both sides of the wellhead subcompartment 161, dividing the portion of the outer annular compartment 15 except the wellhead subcompartment 161 into four local subcompartments 16.

[0034] The main subdivision panel 11 is the same height as the outer wall of the steel barrel foundation 1. The wellhead subdivision panel 12 is the same height as the outer wall of the steel barrel foundation 1. The connecting subdivision panel 13 is less than the outer wall of the steel barrel foundation 1. The dimensions of the steel barrel foundation 1 are a barrel height of 10-20m, an outer diameter of 40-60m, and a barrel wall thickness of 20-50mm. The main subdivision panel 11, the wellhead subdivision panel 12, and the connecting subdivision panel 13 are all 20-40mm thick, and the connecting subdivision panel 13 is 0.2-5m high. In this embodiment, the steel barrel foundation 1 has a barrel height of 15m, an outer diameter of 50m, and a barrel wall thickness of 30mm. The main subdivision panel 11, the wellhead subdivision panel 12, and the connecting subdivision panel 13 are all 30mm thick. The main subdivision panel 11 and the wellhead subdivision panel 12 are both 15m high, and the connecting subdivision panel 13 is 4m high. The concrete column 3 is an arc-shaped structure with equal wall thickness. The outer diameter of the top of the arc section of the concrete column 3 is smaller than the outer diameter of the bottom, and the outer diameter of the bottom is the same as the outer diameter of the inner ring beam 22 .

[0035] The wall thickness of the concrete column 3 is 0.5-1.5 m, and is 1 m in this embodiment.

[0036] The steel tower 4 has a uniform wall thickness structure, with a wall thickness of 0.5-1.5 m, and in this embodiment, 80 mm.

[0037] The concrete beam slab 2 has the same shape and size as the outer contour of the steel barrel foundation 1; the concrete beam slab 2 has a thickness of 0.2-2m. The concrete beam slab 2 includes a concrete base slab 21, an inner ring beam 22, an outer ring beam 23, and longitudinal and transverse beams 24. The inner ring beam 22, outer ring beam 23, and longitudinal and transverse beams 24 are fixedly mounted on the top of the concrete base slab 21. The inner ring beam 22 is located in the middle of the top surface of the concrete base slab 21, with a width of 0.5-2.5m and a height of 0.5-1.5m. The outer ring beam 23 is located at the outer edge of the top surface of the concrete base slab 21, with a width of 0.5-1.5m and a height of 0.5-1.5m. The longitudinal and transverse beams 24 are located between the inner and outer ring beams 22, 23 and include 4-8 longitudinal beams 241 and 10-12 transverse beams 242. The longitudinal beams 241 are longer than the transverse beams 242. In this embodiment, the concrete beam slab 2 has a thickness of 1 m, the inner ring beam 22 has a width of 1 m and a height of 1 m, the outer ring beam 23 has a width of 1 m and a height of 1 m; the longitudinal and transverse beams 24 have a width of 1 m and a height of 1 m.

[0038] The jacket wellhead platform 5 is mounted on the upper ends of the longitudinal and transverse beams 24 and is fixedly connected to the steel tower 4 via connecting cross braces 51. Holes for the riser conductors are provided on the concrete floor 21 at the bottom of the jacket wellhead platform 5 and on the top cover of the steel barrel foundation 1. The longitudinal centerline of the jacket wellhead platform 5 is spaced 15-20 meters from the longitudinal centerline of the steel barrel foundation 1. The top elevation of the jacket wellhead platform 5 is greater than that of the steel tower 4.

[0039] A construction method for a wind power integrated wellhead platform comprises the following steps:

[0040] a. Onshore prefabricated steel barrel foundation 1, steel tower 4 and jacket wellhead platform 5;

[0041] b. The steel top cover of the steel barrel foundation 1 is used as the bottom template of the concrete base plate 21. Rebar is tied to the steel top cover. The concrete base plate 21, the inner ring beam 22, the outer ring beam 23, the longitudinal and transverse beams 24 and the concrete columns 3 are cast together. The steel tower 4 is welded to the top of the concrete column 3; the longitudinal and transverse beams 24 are fixedly connected to the jacket wellhead platform 5 by anchor bolts; then the connecting cross brace 51 is welded to the jacket wellhead platform 5;

[0042] c. Install the oil hole sealing steel plate on the top of the jacket wellhead platform 5. Then, hoist the entire structure consisting of the steel barrel foundation 1, concrete beam slab 2, concrete columns 3, steel tower 4, and jacket wellhead platform 5 into the water. Check the air tightness of the entire structure. Once it is confirmed to meet the air tightness standards, install the wind turbine generator set on the steel tower 4, completing the production of the integrated wind power wellhead platform.

[0043] d. Float and tow the wind power integrated wellhead platform;

[0044] e. After the wind power integrated wellhead platform is floated and towed to the designated sea area, it is first sunk by its own weight and then by suction negative pressure to sink it into the mud to the designated position to complete the installation construction;

[0045] f. The drilling platform is positioned at a certain distance from the outer periphery of the jacket wellhead platform 5, the drilling platform cantilever beam is moved to the top center of the jacket wellhead platform 5, and a connection channel is established with the riser within the jacket wellhead platform 5 to implement drilling operations;

[0046] g. After the drilling operation is completed, the submarine cable, submarine oil and water injection pipelines are laid from the bottom of the outer wall of the jacket wellhead platform 5 to the wellhead of the jacket wellhead platform 5, and then the submarine cable, submarine oil and water injection pipelines are connected to the wellhead of the jacket wellhead platform 5 and debugged to carry out oil and gas field production;

[0047] h. After the oil and gas field is completed, the well is abandoned through the water-tightening pipe inside the jacket wellhead platform 5. The submarine cables, submarine oil and water injection pipelines at the bottom of the outer wall of the jacket wellhead platform 5 are removed. Then, water and air are filled into the steel barrel foundation 1 through a floating crane to lift the wind power integrated wellhead platform, recover it, or move it to the next construction site for installation.

[0048] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments. For ordinary technicians in this field, several variations and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A wind power integrated wellhead platform, comprising a steel barrel foundation (1), a concrete beam plate (2), a concrete column (3) and a steel tower (4) arranged in sequence from bottom to top, and also comprising a jacket wellhead platform (5), wherein the jacket wellhead platform (5) is provided with oil and gas production facilities on top, and is characterized in that: The concrete beam slab (2) is consistent with the shape and size of the outer contour of the steel barrel foundation (1); the concrete beam slab (2) comprises a concrete base plate (21), an inner ring beam (22), an outer ring beam (23) and longitudinal and transverse beams (24); the inner ring beam (22), the outer ring beam (23) and the longitudinal and transverse beams (24) are fixedly arranged on the top of the concrete base plate (21); the inner ring beam (22) is located in the middle of the top surface of the concrete base plate (21), and the outer ring beam (23) is located at the top surface of the concrete base plate (21). At the outer edge, the longitudinal and transverse beams (24) are located between the inner ring beam (22) and the outer ring beam (23), and the longitudinal and transverse beams (24) include longitudinal beams (241) and transverse beams (242); the jacket wellhead platform (5) is arranged at the upper end of the longitudinal and transverse beams (24), and is fixedly connected to the steel tower (4) through a connecting cross brace (51); holes for the water-insulating pipe to pass through are provided on the concrete bottom plate (21) at the bottom of the jacket wellhead platform (5) and on the top cover of the steel barrel foundation (1); The interior of the steel barrel foundation (1) is divided by a main compartment plate (11) into a circular central compartment (14) and a plurality of outer ring compartments (15) of equal volume; at least one outer ring compartment (15) is divided into a plurality of local compartments (16) by an oil wellhead compartment plate (12) and a connecting compartment plate (13), wherein the local compartment (16) surrounded by the oil wellhead compartment plate (12) is an oil wellhead compartment (161), and the oil wellhead compartment (161) is located at the bottom of the jacket wellhead platform (5), and the oil wellhead compartment (161) is used for allowing the water-proof pipe to pass through and enter the mud; There are four oil wellhead compartment panels (12) in total, and four connecting compartment panels (13) in total. The four oil wellhead compartment panels (12) are connected end to end in sequence to enclose a space as the oil wellhead compartment (161). The four connecting compartment panels (13) are divided into two groups, each group having two connecting compartment panels (13). The two groups of connecting compartment panels (13) are respectively arranged on both sides of the oil wellhead compartment (161), and the part of the outer annular compartment (15) except the oil wellhead compartment (161) is divided into four local compartments (16); The height of the main compartment plate (11) is the same as the height of the outer wall of the steel barrel foundation (1).

2. The wind power integrated wellhead platform according to claim 1 is characterized in that: The height of the oil wellhead compartment plate (12) is the same as the height of the outer wall of the steel barrel foundation (1).

3. The wind power integrated wellhead platform according to claim 1 is characterized in that: The height of the connecting compartment plate (13) is smaller than the height of the outer wall of the steel barrel foundation (1).

4. The wind power integrated wellhead platform according to claim 1 is characterized in that: The concrete column (3) is an arc-shaped structure with equal wall thickness. The top outer diameter of the arc section of the concrete column (3) is smaller than the bottom outer diameter, and the bottom outer diameter is the same as the outer diameter of the inner ring beam (22).

5. The wind power integrated wellhead platform according to claim 1 is characterized in that: The steel tower (4) is a structure with uniform wall thickness.

6. The wind power integrated wellhead platform according to claim 1, characterized in that: A wind turbine generator set is installed on the top of the steel tower (4).

7. A method for installing a wind power integrated wellhead platform according to any one of claims 1 to 6, characterized in that: The following steps are involved: a. Onshore prefabricated steel barrel foundation (1), steel tower (4) and jacket wellhead platform (5); b. The steel top cover of the steel barrel foundation (1) is used as the bottom template of the concrete base plate (21), and steel bars are tied to the steel top cover. The concrete base plate (21), the inner ring beam (22), the outer ring beam (23), the longitudinal and transverse beams (24) and the concrete columns (3) are cast together. The steel tower (4) is welded to the top of the concrete column (3); the longitudinal and transverse beams (24) are fixedly connected to the jacket wellhead platform (5) by anchor bolts; and then the connecting cross brace (51) is welded to the jacket wellhead platform (5); c. Install the oil hole sealing steel plate on the upper end of the jacket wellhead platform (5), then hoist the overall structure consisting of the steel barrel foundation (1), concrete beam plate (2), concrete column (3), steel tower (4) and jacket wellhead platform (5) into the water, check the air tightness of the overall structure, and when it is determined that the air tightness meets the standard, install the wind turbine generator set on the steel tower (4) to complete the production of the wind power integrated wellhead platform; d. Float and tow the wind power integrated wellhead platform; e. After the wind power integrated wellhead platform is floated and towed to the designated sea area, it is first sunk by its own weight and then by suction negative pressure to sink it into the mud to the designated position to complete the installation construction; f. The drilling platform is positioned at a certain distance from the outer periphery of the jacket wellhead platform (5), the cantilever beam of the drilling platform is moved to the top center of the jacket wellhead platform (5), and a connection channel is established with the riser within the jacket wellhead platform (5) to implement drilling operations; g. After the drilling operation is completed, the submarine cable, submarine oil and water pipelines are laid from the bottom of the outer wall of the jacket wellhead platform (5) to the wellhead of the jacket wellhead platform (5), and then the submarine cable, submarine oil and water pipelines are connected to the wellhead of the jacket wellhead platform (5), and debugged to carry out oil and gas field production; h. After the oil and gas field is completed, the well is abandoned through the water-insulating pipe in the jacket wellhead platform (5), and the submarine cables, submarine oil and water injection pipelines at the bottom of the outer wall of the jacket wellhead platform (5) are removed. Then, water and air are filled into the steel barrel foundation (1) through the floating crane to lift the wind power integrated wellhead platform, and then it is recovered or moved to the next construction site for installation.

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